Rename WebGLConformanceTests to WebGLConformanceTest

This fits better with the rest chrome naming.

I need to clean this up before putting the WebGLConformanceTest in buildbot script.  Otherwise if we change this later, it will require another waterfall restart.

Note that the content side WebGLConformanceTest is not running anywhere

Also, add content_browsertests to chromium_gpu_builder and chromium_gpu_debug_builder, so we could run them on GPU bots.

BUG=111506
TEST=manual
Review URL: https://codereview.chromium.org/11453026

git-svn-id: http://src.chromium.org/svn/trunk/src/build@171595 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -279,6 +279,7 @@
             '../chrome/chrome.gyp:gpu_tests',
             '../chrome/chrome.gyp:performance_browser_tests',
             '../chrome/chrome.gyp:performance_ui_tests',
+            '../content/content.gyp:content_browsertests',
             '../gpu/gpu.gyp:gl_tests',
           ],
           'conditions': [
@@ -294,6 +295,7 @@
           'type': 'none',
           'dependencies': [
             '../chrome/chrome.gyp:gpu_tests',
+            '../content/content.gyp:content_browsertests',
             '../gpu/gpu.gyp:gl_tests',
           ],
           'conditions': [