Remove ENABLE_PRINTING from features.gypi

There still is one use of ENABLE_PRINTING left in WebFrameImpl.cpp, but
this will be enabled because common.gypi also enables ENABLE_PRINTING when
when enable_printing==1 (true for desktop). The define is being defined
twice on the command line right now.

R=whywhat, cimamoglu
BUG=147070

Review URL: https://chromiumcodereview.appspot.com/22895004

git-svn-id: svn://svn.chromium.org/blink/trunk@156102 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: [CanvasProfiler] Include a list of enabled WebGL extensions into the state obtained by CanvasAgent.getResourceState.

A list of enabled WebGL extensions can not be obtained directly via the WebGL API, but we can track this information.
Drive-by: provide some extension-related state if a corresponding extension is enabled.

BUG=253854
R=pfeldman,caseq@chromium.org

Review URL: https://chromiumcodereview.appspot.com/22950011

git-svn-id: svn://svn.chromium.org/blink/trunk@156103 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Simplify indexed back/forward navigations

Before this patch:
* Something calls goBack, goForward, or goBackOrForward on BackForwardController.
* BackForwardClientImpl creates a fake HistoryItem with a url of the form chrome-back-forward://go/<offset> and returns it to BackFowardController
* BackForwardController passes that fake HistoryItem to HistoryController::goToItem through Page::goToItem.
* HistoryController::goToItem calls FrameLoaderClient::shouldGoToHistoryItem, which decodes the fake HistoryItem's url, gets the offset we want to navigate, and passes that to WebViewClient::navigationBackForwardSoon.

After this patch:
* Something calls goBackOrForward on BackForwardController.
* BackForwardController calls FrameLoaderClient::navigationBackForward() with the integer offset, which in turn calls WebViewClient::navigationBackForwardSoon

BUG=none

Review URL: https://chromiumcodereview.appspot.com/23122002

git-svn-id: svn://svn.chromium.org/blink/trunk@156104 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert "Fix creating InjectedScript too early causing extension bindings not to work."

This reverts commit 5bee3a037490e86ca3ab26252cc510986979f4dd.

Reverting to fix failing telemetry_unittests on mac_rel so that
Blink rolls can go through.

BUG=
R=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/23202002

git-svn-id: svn://svn.chromium.org/blink/trunk@156105 bbb929c8-8fbe-4397-9dbb-9b2b20218538