Updated work on adding service class

Some minor changes which I want to store away. Starting to see the final
version of this code. Also started to add a test case copied from the
options test. All this is a work in progress.

atest/acceptance/multiple_browsers_service.robot

@@ -0,0 +1,53 @@
+*** Settings ***
+Suite Teardown    Close All Browsers
+# Library           ../resources/testlibs/get_selenium_options.py
+Resource          resource.robot
+# Force Tags        Known Issue Firefox    Known Issue Safari    Known Issue Internet Explorer
+Documentation     Creating test which would work on all browser is not possible.
+...    These tests are for Chrome only.
+
+*** Test Cases ***
+Chrome Browser With Chrome Service As String
+    [Documentation]
+    ...    LOG 1:14 DEBUG GLOB: *"goog:chromeOptions"*
+    # ...    LOG 1:14 DEBUG GLOB: *args": ["--disable-dev-shm-usage"?*
+    Open Browser    ${FRONT PAGE}    ${BROWSER}    remote_url=${REMOTE_URL}
+    ...    service=executable_path=/usr/local/bin; port=9999
+
+Chrome Browser With Chrome Service As String With service_args As List
+    [Documentation]
+    ...    LOG 1:14 DEBUG GLOB: *"goog:chromeOptions"*
+    ...    LOG 1:14 DEBUG GLOB: *args": ["--disable-dev-shm-usage"?*
+    ...    LOG 1:14 DEBUG GLOB: *"--headless=new"*
+    Open Browser    ${FRONT PAGE}    ${BROWSER}    remote_url=${REMOTE_URL}
+    ...    service=service_args=['--append-log', '--readable-timestamp'], log_output=log_path)
+
+Chrome Browser With Selenium Options With Complex Object
+    [Tags]    NoGrid
+    [Documentation]
+    ...    LOG 1:14 DEBUG GLOB: *"goog:chromeOptions"*
+    ...    LOG 1:14 DEBUG GLOB: *"mobileEmulation": {"deviceName": "Galaxy S5"*
+    ...    LOG 1:14 DEBUG GLOB: *args": ["--disable-dev-shm-usage"?*
+    Open Browser    ${FRONT PAGE}    ${BROWSER}    remote_url=${REMOTE_URL}
+    ...    options=add_argument ( "--disable-dev-shm-usage" ) ; add_experimental_option( "mobileEmulation" , { 'deviceName' : 'Galaxy S5'})
+
+Chrome Browser With Selenium Options Object
+    [Documentation]
+    ...    LOG 2:14 DEBUG GLOB: *"goog:chromeOptions"*
+    ...    LOG 2:14 DEBUG GLOB: *args": ["--disable-dev-shm-usage"?*
+    ${options} =    Get Chrome Options
+    Open Browser    ${FRONT PAGE}    ${BROWSER}    remote_url=${REMOTE_URL}
+    ...    desired_capabilities=${DESIRED_CAPABILITIES}    options=${options}
+
+Chrome Browser With Selenium Options Invalid Method
+    Run Keyword And Expect Error     AttributeError: 'Options' object has no attribute 'not_here_method'
+    ...    Open Browser    ${FRONT PAGE}    ${BROWSER}    remote_url=${REMOTE_URL}
+    ...    desired_capabilities=${DESIRED_CAPABILITIES}    options=not_here_method("arg1")
+
+
+Chrome Browser With Selenium Options Argument With Semicolon
+    [Documentation]
+    ...    LOG 1:14 DEBUG GLOB: *"goog:chromeOptions"*
+    ...    LOG 1:14 DEBUG GLOB: *["has;semicolon"*
+    Open Browser    ${FRONT PAGE}    ${BROWSER}    remote_url=${REMOTE_URL}
+    ...    desired_capabilities=${DESIRED_CAPABILITIES}    options=add_argument("has;semicolon")

src/SeleniumLibrary/keywords/webdrivertools/webdrivertools.py

@@ -578,6 +578,17 @@ def _split(self, service):
         split_service.append(service[start_position:])
         return split_service
 
+    def _dualsplit(self, service_or_attr, splittok):
+        split_string = []
+        start_position = 0
+        tokens = generate_tokens(StringIO(service_or_attr).readline)
+        for toknum, tokval, tokpos, _, _ in tokens:
+            if toknum == token.OP and tokval == splittok:
+                split_string.append(service_or_attr[start_position : tokpos[1]].strip())
+                start_position = tokpos[1] + 1
+        split_string.append(service_or_attr[start_position:])
+        return split_string
+
 class SeleniumOptions:
     def create(self, browser, options):
         if not options: