This patch is to enable x86 android build.

patch includes two parts:
1. gyp files modification to include x86 android build.
2. add android config files for yasm which is copied from linux ones. enable android x86 build

This patch is cloned from the issue #10198027 for ownership issue. 
https://chromiumcodereview.appspot.com/10198027/

BUG=125160
TEST=


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=135087

Review URL: http://codereview.chromium.org/10271039

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@135110 0039d316-1c4b-4281-b951-d872f2087c98

base/base.gypi

@@ -686,6 +686,13 @@
           ],
         }],
         [ 'OS == "android" and _toolset == "target"', {
+          'conditions': [
+            ['target_arch == "ia32"', {
+              'sources/': [
+                ['include', '^atomicops_internals_x86_gcc\\.cc$'],
+              ],
+            }],
+          ],
           'dependencies': [
             'symbolize',
             '../third_party/ashmem/ashmem.gyp:ashmem',

build/android/envsetup.sh

@@ -45,7 +45,25 @@ case "${host_os}" in
     return 1
 esac
 
-export ANDROID_TOOLCHAIN="${ANDROID_NDK_ROOT}/toolchains/arm-linux-androideabi-4.4.3/prebuilt/${toolchain_dir}/bin/"
+# The following defines will affect ARM code generation of both C/C++ compiler
+# and V8 mksnapshot.
+case "${TARGET_PRODUCT-full}" in
+  "full")
+    DEFINES=" target_arch=arm"
+    DEFINES+=" arm_neon=0 armv7=1 arm_thumb=1 arm_fpu=vfpv3-d16"
+    toolchain_arch="arm-linux-androideabi-4.4.3"
+    ;;
+  *x86*)
+    DEFINES=" target_arch=ia32 use_libffmpeg=0"
+    toolchain_arch="x86-4.4.3"
+    ;;
+  *)
+    echo "TARGET_PRODUCT: ${TARGET_PRODUCT} is not supported." >& 2
+    return 1
+esac
+
+toolchain_path="${ANDROID_NDK_ROOT}/toolchains/${toolchain_arch}/prebuilt/"
+export ANDROID_TOOLCHAIN="${toolchain_path}/${toolchain_dir}/bin/"
 
 export ANDROID_SDK_VERSION="15"
 
@@ -97,7 +115,7 @@ export STRIP=$(echo ${ANDROID_TOOLCHAIN}/*-strip)
 
 # The set of GYP_DEFINES to pass to gyp. Use 'readlink -e' on directories
 # to canonicalize them (remove double '/', remove trailing '/', etc).
-DEFINES="OS=android"
+DEFINES+=" OS=android"
 DEFINES+=" android_build_type=0"  # Currently, Only '0' is supportted.
 DEFINES+=" host_os=${host_os}"
 DEFINES+=" linux_fpic=1"
@@ -113,26 +131,6 @@ DEFINES+=" build_ffmpegsumo=0"
 DEFINES+=" gtest_target_type=executable"
 DEFINES+=" branding=Chromium"
 
-# If the TARGET_PRODUCT wasn't set, use 'full' by default.
-if [ -z "${TARGET_PRODUCT}" ]; then
-  TARGET_PRODUCT="full"
-fi
-
-# The following defines will affect ARM code generation of both C/C++ compiler
-# and V8 mksnapshot.
-case "${TARGET_PRODUCT}" in
-  "full")
-    DEFINES+=" target_arch=arm"
-    DEFINES+=" arm_neon=0 armv7=1 arm_thumb=1 arm_fpu=vfpv3-d16"
-    ;;
-  *x86*)
-    DEFINES+=" target_arch=ia32 use_libffmpeg=0"
-    ;;
-  *)
-    echo "TARGET_PRODUCT: ${TARGET_PRODUCT} is not supported." >& 2
-    return 1
-esac
-
 export GYP_DEFINES="${DEFINES}"
 
 # Use the "android" flavor of the Makefile generator for both Linux and OS X.

build/common.gypi

@@ -823,7 +823,16 @@
         'variables': {
           'variables': {
             'android_ndk_root%': '<!(/bin/echo -n $ANDROID_NDK_ROOT)',
-            'target_arch%': 'arm',  # target_arch in android terms.
+            # Android uses x86 instead of ia32 for their target_arch 
+            # designation.
+            # TODO(wistoch): Adjust the target_arch naming scheme to avoid 
+            # confusion.
+            # http://crbug.com/125329
+            'conditions': [
+              ['target_arch == "ia32"', {
+                'target_arch': 'x86',
+              }],
+            ],
 
             # Switch between different build types, currently only '0' is
             # supported.
@@ -978,7 +987,7 @@
         ],
       }],
 
-      ['os_posix==1 and chromeos==0 and target_arch!="arm"', {
+      ['os_posix==1 and chromeos==0 and OS!="android"', {
         'use_cups%': 1,
       }, {
         'use_cups%': 0,
@@ -2381,7 +2390,6 @@
             'ldflags': [
               '-nostdlib',
               '-Wl,--no-undefined',
-              '-Wl,--icf=safe',  # Enable identical code folding to reduce size
               # Don't export symbols from statically linked libraries.
               '-Wl,--exclude-libs=ALL',
             ],
@@ -2400,6 +2408,12 @@
                   '--sysroot=<(android_ndk_sysroot)',
                 ],
               }],
+              ['target_arch == "arm"', {
+                'ldflags': [
+                  # Enable identical code folding to reduce size.
+                  '-Wl,--icf=safe',
+                ],
+              }],
               # NOTE: The stlport header include paths below are specified in
               # cflags rather than include_dirs because they need to come
               # after include_dirs. Think of them like system headers, but

skia/skia.gyp

@@ -1099,8 +1099,13 @@
             '../third_party/skia/src/opts/SkBlitRow_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkUtils_opts_SSE2.cpp',
           ],
-          'dependencies': [
-            'skia_opts_ssse3',
+          'conditions': [
+            # x86 Android doesn't support SSSE3 instructions.
+            [ 'OS != "android"', {
+              'dependencies': [
+                'skia_opts_ssse3',
+              ],
+            }],
           ],
         },
         {  # arm

third_party/yasm/README.chromium

@@ -32,7 +32,8 @@ Instructions for recreating the yasm.gyp file.
      compiler warnings.
 
   5) Grab the generated Makefile, libyasm-stdint.h, config.h, and put into
-     the correct platform location.
+     the correct platform location. For android platform, copy the files
+     generated for linux.
 
        src/third_party/yasm/source/config/[platform]